Hello,
I created UDP server with LwIP stack on STM32F407. I tried example udp_echo
_server. It works.
Now I need send from server my own answer data in callback function.
The program hangs in callback function.
void udp_echoserver_receive_callback(void *arg, struct udp_pcb *upcb, struct
pbuf *p, const ip_addr_t *addr, u16_t port)
{
unsigned char buffer[80] = "my name is xxxxxxx";
p->payload = buffer;
p->len = p->tot_len = 20;
/* Connect to the remote client */
udp_connect(upcb, addr, UDP_CLIENT_PORT);
/* Tell the client that we have accepted it */
udp_send(upcb, p);
/* free the UDP connection, so we can accept new clients */
udp_disconnect(upcb);
/* Free the p buffer */
pbuf_free(p);
}
What is wrong ?
Is somewhere on web LwIP stack guide?
Thank you
Peter
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